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package com.vaadin.tests.components.combobox;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Optional;
import com.vaadin.server.VaadinRequest;
import com.vaadin.tests.components.AbstractTestUIWithLog;
import com.vaadin.ui.Button;
import com.vaadin.ui.CheckBox;
import com.vaadin.ui.ComboBox;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.Label;
import com.vaadin.ui.Notification;
public class ComboBoxAddNewItemAndResetProviderAtSameRound
extends AbstractTestUIWithLog {
ComboBox<String> comboBox;
List<String> items = new ArrayList<>();
Label resetLabel = new Label("Reset Label");
Label valueLabel = new Label("Value Label");
CheckBox delay = new CheckBox("Slow adding process", false);
@Override
protected void setup(VaadinRequest request) {
initItems();
comboBox = new ComboBox(null, items);
comboBox.setTextInputAllowed(true);
comboBox.setEmptySelectionAllowed(true);
comboBox.addValueChangeListener(event -> {
valueLabel.setValue(comboBox.getValue());
log("ComboBox value : " + comboBox.getValue());
});
configureNewItemHandling();
Button checkButton = new Button("Check ComboBox value", e -> {
Notification.show("selected: " + comboBox.getValue());
});
Button resetButton = new Button("Reset options", e -> {
comboBox.setValue(null);
initItems();
comboBox.getDataProvider().refreshAll();
resetLabel.setValue("Reset");
valueLabel.setValue("Value is reset");
log("DataProvider has been reset");
});
resetLabel.setId("reset-label");
valueLabel.setId("value-label");
delay.setId("delay");
resetButton.setId("reset");
Button button = new Button("Button for clicking only");
button.setId("button-for-click");
HorizontalLayout hl = new HorizontalLayout(checkButton, button);
addComponents(comboBox, resetLabel, valueLabel, hl, resetButton, delay);
}
private void configureNewItemHandling() {
comboBox.setNewItemProvider(text -> {
if (delay.getValue()) {
try {
Thread.sleep(2000);
} catch (InterruptedException e1) {
e1.printStackTrace();
}
}
items.add(text);
Collections.sort(items);
comboBox.getDataProvider().refreshAll();
log("New item has been added");
return Optional.of(text);
});
}
private void initItems() {
items.clear();
StringBuilder builder = new StringBuilder();
for (char c = 'a'; c <= 'z'; c++) {
for (int i = 0; i < 100; i++) {
builder.setLength(0);
items.add(builder.append(c).append(i).toString());
}
}
}
@Override
protected Integer getTicketNumber() {
return 11343;
}
}
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